NEBNext® End Repair Module

Catalog # Concentration Size List Price Quantity Your Price
E6050L 100 reactions $600.00
E6050S 20 reactions $151.00
Catalog # Size List Price Your Price
E6050L 100 reactions $600.00
E6050S 20 reactions $151.00
Catalog #
*On-line ordering is for Canadian customers only. Web pricing is applicable only to orders placed online at
This module is part of the original standard library prep workflow, which is longer than the NEBNext® Ultra II DNA Library Prep Kit (NEB #E7645) workflow, has more components, and requires more clean-up steps. It also requires higher input amounts: 1 - 5 μg of input DNA vs. 500 pg - 1 μg required for the Ultra II DNA workflow.


The NEBNext End Repair Module has been optimized to convert 1 μg–5 μg of fragmented DNA to blunt-ended DNA having 5′ phosphates, and 3′-hydroxyls. The module is optimized for use with the NEBNext dA-Tailing Module (NEB #E6053), and is part of the original standard DNA library prep workflow for Illumina sequencing.

Each kit component must pass rigorous quality control standards, and for each new lot the entire set of reagents is functionally validated together by construction and sequencing of an indexed library on the Illumina sequencing platform. 

Reagents Supplied

The following reagents are supplied with this product:

NEB # Component Name Component # Stored at (°C) Amount Concentration
  NEBNext End Repair Enzyme Mix E6051AVIAL -20 1 x 0.1 ml
  NEBNext End Repair Reaction Buffer E6052AVIAL -20 1 x 0.2 ml 10 X
  NEBNext End Repair Enzyme Mix E6051AAVIAL -20 1 x 0.5 ml
  NEBNext End Repair Reaction Buffer E6052AAVIAL -20 1 x 1 ml 10 X
Application Features
  • DNA sample preparation
  • End repair of 1-5 μg fragmented DNA

Properties & Usage

Materials Required but not Supplied

AMPure® XP Beads (Beckman Coulter, Inc. #A63881) or SPRIselect® Reagent Kit
(Beckman Coulter, Inc. #B23317)
10 µM Tris-HCl, pH 7.5-8.0 or 0.1 µM Tris-HCl, pH 8.0
Magnetic rack or plate (e.g., NEBNext® Magnetic Separation Rack (NEB #S1515S), Alpaqua ® 96S Super Magnet Plate (#A001322), or equivalent)

Quality Control Assay
Quality Control tests are performed on each new lot of NEB product to meet the specifications designated for it. Specifications and individual lot data from the tests that are performed for this particular product can be found and downloaded on the Product Specification Sheet, Certificate of Analysis, data card or product manual. Further information regarding NEB product quality can be found here.
The Specification sheet is a document that includes the storage temperature, shelf life and the specifications designated for the product. The following file naming structure is used to name these document files: [Product Number]_[Size]_[Version]
Legal And Disclaimer

Products and content are covered by one or more patents, trademarks and/or copyrights owned or controlled by New England Biolabs, Inc (NEB). The use of trademark symbols does not necessarily indicate that the name is trademarked in the country where it is being read; it indicates where the content was originally developed. The use of this product may require the buyer to obtain additional third-party intellectual property rights for certain applications. For more information, please email

This product is intended for research purposes only. This product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.

New England Biolabs (NEB) is committed to practicing ethical science – we believe it is our job as researchers to ask the important questions that when answered will help preserve our quality of life and the world that we live in. However, this research should always be done in safe and ethical manner. Learn more.